To add the fractions \( \frac{5}{8} \) and \( \frac{1}{8} \), you simply add the numerators since the denominators are the same:
\[ \frac{5}{8} + \frac{1}{8} = \frac{5 + 1}{8} = \frac{6}{8} \]
Now, you can simplify \( \frac{6}{8} \):
\[ \frac{6}{8} = \frac{3}{4} \]
So, \( \frac{5}{8} + \frac{1}{8} = \frac{3}{4} \).